单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．They lived in caves.
B．They faced their homes towards the south.
C．They used animal skins as insulation.
D．They made fire inside their houses.
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单项选择题
A．People can spray coniine oxide on their car engines easily.B．The material works as a pollution filter.C．The material saves fuel for it reflects back the heat of burning fuel.D．When burnt, the material will save fuel.
A．People can spray coniine oxide on their car engines easily.
B．The material works as a pollution filter.
C．The material saves fuel for it reflects back the heat of burning fuel.
D．When burnt, the material will save fuel.
单项选择题
A．The Celts.B．The Jutes.C．The German.D．The Norman rulers.
A．The Celts.
B．The Jutes.
C．The German.
D．The Norman rulers.
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